The theory of "bodily origination and spiritual survival of the soul" not only points out to the circumstances of the emergence of the human soul but also indicates the essence of the soul. Through his novel principls and especially by substantial motion, Mulla Sadra arrives at the theory in which human nature at the moment of its emergence is a bodily entity. This bodily soul passes the first rank of existence by substantial motion to the extent that reaches the highest rank of existence which is spiritual. Besides that, this theory uses the common principles of transcendent theosophy; it also has its own principles, that knowing them can make this theory more understandable.